1. Dragon riding:
Dragon riding is the laziest thing in this dlc. It would be stupid to think that this would be like horse riding, but the dragons just fly pointlessy in circles from where you tame them and what's stupid is that they cover vast quantities of ingame land with thier circles so it's clear that you could at least make a custom marker on your map and have them fly to it with the technological limits at hand
2. Werebears:
Werebears while not a common new enemy are still prevalent in the lands of solstheim. Thier presence should mean one thing to a seasoned elder scrolls player: get bit by one and become one. But even without being a werewolf or a vampire if you get enough bites to become swiss cheese the disease will not be passed to you. This makes me believe that this was unfinished and rushed out the door.
3. Morang Tong:
The morang tong are indeed in this dlc and as you know they are the thieves guild, dark brotherhood, and forsworn on some very heavy steroids. Thier assasins are in this dlc and you will get hits put on you by people you did wrong against. They even have a headquarters for God's sake and you still can't be one. Not only that that thier armor is not even a different color, its just plain chitin armor with different stats.
4. Apocrypha:
Apocrypha's design is just plain genius, but some of you already know the nature of this realm: It's not free world. There is only the bits of apocrypha traveled to when opening a black books and all worlds are not interconnected. Once again the walls move on thier own and apocrypha is magnificiently designed, but that doesn't change the stupidity.
5. New unique armors
The new unique armors are not even reskins let alone unique designs. They share the exact same appearance as other armors from the dlc with different stats. The enchantments are still cool but in another [censored] move you can't disenchant them.
6. Spears:
This lower on the list because It doesn't add potential to the dlc in and of itself but the way they are implemented is so [censored] that it deserves a place on this list. Spears are used as arrows. You heard that right and they have the same strength as iron arrows to boot.
7. New armor useless:
As you know the dlc has massively harder enemies and quests than the main dlc and the quests are normally scaled at about level 50, but the new armor types are incredibly weak when compared to daedric despite the land and general quests being so much harder than normal skyrim, what makes this even more [censored] is that the game gives you massive money rewards for certain quests (10000 septims!) and acknowledges that the rewards should be more worth it.
if I missed anything let me know.